12 weeks and kicking?

Hi guys. I’m 20 with my first ever pregnancy. I’m currently 12wks 5 days and it’s been a roller coaster of vomiting and sickness. Regardless I feel blessed and excited for baby. I’ve been having weird flutter tingles on my lower stomach and from the ultrasound baby is crazy active. I haven’t gained any weight so far. Am I actually feeling baby or is this all in my head?